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Phosphorus recycling from waste activated sludge using the hydrothermal platform: Recovery, solubility and phytoavailability
Year:
2023
Source of publication :
Waste Management
Authors :
Erel, Ran
;
.
Gaur, Rubia Zahid
;
.
Laor, Yael
;
.
Posmanik, Roy
;
.
Zohar, Matat
;
.
Volume :
169
Co-Authors:

Osama Khoury 
Rubia Gaur
Matat Zohar
Ran Erel
Yael Laor 
Roy Posmanik

Facilitators :
From page:
23
To page:
31
(
Total pages:
9
)
Abstract:

To address the grand challenge of increasing the sustainability of wastewater treatment plants, hydrothermal carbonization was studied as a nutrient recovery platform, transforming sludge into a valuable hydrochar. Carbonization was achieved at different temperatures (200–300 °C) and durations (30–120 min). The highest mass recovery (73%) was observed in the lowest temperature, while the lowest (49%) was obsereved at the highest temperature. Under all reaction conditions, phosphorus recovery values exceeded 80%, with the dominated fraction of inorganic-P in the hydrochar being HCl-extractable. Although HCl-extractable P is considered a moderately labile P fraction, P phytoavailability assays indicate that sewage sludge hydrochar is an excellent source for P, surpassing soluble P, likely due to its slow-release nature. We postulate that polyphosphates constitute a significant portion of this P pool. Overall, we emphasize the benefits of using HTC as a circular economy approach to convert sludge into a valuable hydrochar.

Note:
Related Files :
Circular economy
Hydrochar
P intensification
Resource recovery
soil amendment
Show More
Related Content
More details
DOI :
10.1016/j.wasman.2023.06.035
Article number:
0
Affiliations:
Database:
PubMed
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
64869
Last updated date:
09/07/2023 16:01
Creation date:
09/07/2023 16:01
You may also be interested in
Scientific Publication
Phosphorus recycling from waste activated sludge using the hydrothermal platform: Recovery, solubility and phytoavailability
169

Osama Khoury 
Rubia Gaur
Matat Zohar
Ran Erel
Yael Laor 
Roy Posmanik

Phosphorus recycling from waste activated sludge using the hydrothermal platform: Recovery, solubility and phytoavailability

To address the grand challenge of increasing the sustainability of wastewater treatment plants, hydrothermal carbonization was studied as a nutrient recovery platform, transforming sludge into a valuable hydrochar. Carbonization was achieved at different temperatures (200–300 °C) and durations (30–120 min). The highest mass recovery (73%) was observed in the lowest temperature, while the lowest (49%) was obsereved at the highest temperature. Under all reaction conditions, phosphorus recovery values exceeded 80%, with the dominated fraction of inorganic-P in the hydrochar being HCl-extractable. Although HCl-extractable P is considered a moderately labile P fraction, P phytoavailability assays indicate that sewage sludge hydrochar is an excellent source for P, surpassing soluble P, likely due to its slow-release nature. We postulate that polyphosphates constitute a significant portion of this P pool. Overall, we emphasize the benefits of using HTC as a circular economy approach to convert sludge into a valuable hydrochar.

Scientific Publication
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